How many cm cubed in a km cubed?

We can use the relationship:

there is 100cm in 1m and 1000m in 1km

so that means there is 100,000cm in 1km

and if you cube that (100,000x100,000x100,000)

which equals 1,000,000,000,000,000 (fifteen zero's)

you pronounce it one thousand, million, million.

(i know it sounds stupid but I'm told that's right!!)